const assert = require('assert');
const util = require('util');
const stringify = require('json-stable-stringify');

class SomeClass {
  constructor(x, y) {
    this.x = x;
    this.y = y;
  }
}

const ob1 = new SomeClass(1, 2);
const ob2 = {
  x: 1,
  y: 2
};

assert.deepEqual(ob1, ob2);  // true
assert.deepStrictEqual(ob1, ob2); // false

// This also does a deep check that works in the situation
// when `assert.deepStrictEqual` fails.
assert.strictEqual(stringify(ob1), stringify(ob2)); // true